I am sorry for posting this question here, but this problem has bothered me for couple days...
and most of information I found from Google didn't really help me solving the problems.

My development environment is:
  • Qwt 6.1.0
  • Win 7 32bit
  • Qt 4.8.5 (for MSVC2010)
  • Qt creator 3.0.0 (standalone version, not from SDK package, and I use MSVC2010 compiler)


Here is how I installed Qwt. I've followed the building steps from this site: http://www.k9spud.com/Qwt-Plug-in
For simplicity, these are what I've done:

  1. download Qwt 6.1.0 zip file from sourceforge
  2. unzip it to D:/Qt/qwt-6.1.0
  3. open command promt of Qt 4.8.5, run qmake then nmake to compile the qwt.pro file
  4. Copy"qwt_designer_plugin.dll" to D:Qt/qtcreator-3.0.0/bin/plugins/designer
  5. Copy "qwt.dll" and "qwtd.dll" to some specific folders


When I want to use Qwt widgets in form editor (designer) of Qt creator, I found there is no Qwt widget can be used.
The Tools->Form Editor->About Qt Designer Plugins shows the error message about "qwt_designer_plugin.dll" which is

"Plugin verification data dismatch"

Although I can still run and compile Qwt examples, and create my own Qwt project without the help of designer, I do want to use the designer features in Qt creator.

Could someone please give me a direction or reference site for how to solve this problem?
Thanks in advance.